1 files changed, 0 insertions, 460 deletions
diff --git a/drivers/gpio/gpio-mxc.c b/drivers/gpio/gpio-mxc.c
deleted file mode 100644
index 89fda58db90..00000000000
--- a/drivers/gpio/gpio-mxc.c
+++ /dev/null
@@ -1,460 +0,0 @@
-/*
- * MXC GPIO support. (c) 2008 Daniel Mack <daniel@caiaq.de>
- * Copyright 2008 Juergen Beisert, kernel@pengutronix.de
- *
- * Based on code from Freescale,
- * Copyright (C) 2004-2010 Freescale Semiconductor, Inc. All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
- */
-
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/io.h>
-#include <linux/irq.h>
-#include <linux/gpio.h>
-#include <linux/platform_device.h>
-#include <linux/slab.h>
-#include <linux/basic_mmio_gpio.h>
-#include <linux/of.h>
-#include <linux/of_device.h>
-#include <asm-generic/bug.h>
-
-enum mxc_gpio_hwtype {
-	IMX1_GPIO,	/* runs on i.mx1 */
-	IMX21_GPIO,	/* runs on i.mx21 and i.mx27 */
-	IMX31_GPIO,	/* runs on all other i.mx */
-};
-
-/* device type dependent stuff */
-struct mxc_gpio_hwdata {
-	unsigned dr_reg;
-	unsigned gdir_reg;
-	unsigned psr_reg;
-	unsigned icr1_reg;
-	unsigned icr2_reg;
-	unsigned imr_reg;
-	unsigned isr_reg;
-	unsigned low_level;
-	unsigned high_level;
-	unsigned rise_edge;
-	unsigned fall_edge;
-};
-
-struct mxc_gpio_port {
-	struct list_head node;
-	void __iomem *base;
-	int irq;
-	int irq_high;
-	int virtual_irq_start;
-	struct bgpio_chip bgc;
-	u32 both_edges;
-};
-
-static struct mxc_gpio_hwdata imx1_imx21_gpio_hwdata = {
-	.dr_reg		= 0x1c,
-	.gdir_reg	= 0x00,
-	.psr_reg	= 0x24,
-	.icr1_reg	= 0x28,
-	.icr2_reg	= 0x2c,
-	.imr_reg	= 0x30,
-	.isr_reg	= 0x34,
-	.low_level	= 0x03,
-	.high_level	= 0x02,
-	.rise_edge	= 0x00,
-	.fall_edge	= 0x01,
-};
-
-static struct mxc_gpio_hwdata imx31_gpio_hwdata = {
-	.dr_reg		= 0x00,
-	.gdir_reg	= 0x04,
-	.psr_reg	= 0x08,
-	.icr1_reg	= 0x0c,
-	.icr2_reg	= 0x10,
-	.imr_reg	= 0x14,
-	.isr_reg	= 0x18,
-	.low_level	= 0x00,
-	.high_level	= 0x01,
-	.rise_edge	= 0x02,
-	.fall_edge	= 0x03,
-};
-
-static enum mxc_gpio_hwtype mxc_gpio_hwtype;
-static struct mxc_gpio_hwdata *mxc_gpio_hwdata;
-
-#define GPIO_DR			(mxc_gpio_hwdata->dr_reg)
-#define GPIO_GDIR		(mxc_gpio_hwdata->gdir_reg)
-#define GPIO_PSR		(mxc_gpio_hwdata->psr_reg)
-#define GPIO_ICR1		(mxc_gpio_hwdata->icr1_reg)
-#define GPIO_ICR2		(mxc_gpio_hwdata->icr2_reg)
-#define GPIO_IMR		(mxc_gpio_hwdata->imr_reg)
-#define GPIO_ISR		(mxc_gpio_hwdata->isr_reg)
-
-#define GPIO_INT_LOW_LEV	(mxc_gpio_hwdata->low_level)
-#define GPIO_INT_HIGH_LEV	(mxc_gpio_hwdata->high_level)
-#define GPIO_INT_RISE_EDGE	(mxc_gpio_hwdata->rise_edge)
-#define GPIO_INT_FALL_EDGE	(mxc_gpio_hwdata->fall_edge)
-#define GPIO_INT_NONE		0x4
-
-static struct platform_device_id mxc_gpio_devtype[] = {
-	{
-		.name = "imx1-gpio",
-		.driver_data = IMX1_GPIO,
-	}, {
-		.name = "imx21-gpio",
-		.driver_data = IMX21_GPIO,
-	}, {
-		.name = "imx31-gpio",
-		.driver_data = IMX31_GPIO,
-	}, {
-		/* sentinel */
-	}
-};
-
-static const struct of_device_id mxc_gpio_dt_ids[] = {
-	{ .compatible = "fsl,imx1-gpio", .data = &mxc_gpio_devtype[IMX1_GPIO], },
-	{ .compatible = "fsl,imx21-gpio", .data = &mxc_gpio_devtype[IMX21_GPIO], },
-	{ .compatible = "fsl,imx31-gpio", .data = &mxc_gpio_devtype[IMX31_GPIO], },
-	{ /* sentinel */ }
-};
-
-/*
- * MX2 has one interrupt *for all* gpio ports. The list is used
- * to save the references to all ports, so that mx2_gpio_irq_handler
- * can walk through all interrupt status registers.
- */
-static LIST_HEAD(mxc_gpio_ports);
-
-/* Note: This driver assumes 32 GPIOs are handled in one register */
-
-static int gpio_set_irq_type(struct irq_data *d, u32 type)
-{
-	u32 gpio = irq_to_gpio(d->irq);
-	struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
-	struct mxc_gpio_port *port = gc->private;
-	u32 bit, val;
-	int edge;
-	void __iomem *reg = port->base;
-
-	port->both_edges &= ~(1 << (gpio & 31));
-	switch (type) {
-	case IRQ_TYPE_EDGE_RISING:
-		edge = GPIO_INT_RISE_EDGE;
-		break;
-	case IRQ_TYPE_EDGE_FALLING:
-		edge = GPIO_INT_FALL_EDGE;
-		break;
-	case IRQ_TYPE_EDGE_BOTH:
-		val = gpio_get_value(gpio);
-		if (val) {
-			edge = GPIO_INT_LOW_LEV;
-			pr_debug("mxc: set GPIO %d to low trigger\n", gpio);
-		} else {
-			edge = GPIO_INT_HIGH_LEV;
-			pr_debug("mxc: set GPIO %d to high trigger\n", gpio);
-		}
-		port->both_edges |= 1 << (gpio & 31);
-		break;
-	case IRQ_TYPE_LEVEL_LOW:
-		edge = GPIO_INT_LOW_LEV;
-		break;
-	case IRQ_TYPE_LEVEL_HIGH:
-		edge = GPIO_INT_HIGH_LEV;
-		break;
-	default:
-		return -EINVAL;
-	}
-
-	reg += GPIO_ICR1 + ((gpio & 0x10) >> 2); /* lower or upper register */
-	bit = gpio & 0xf;
-	val = readl(reg) & ~(0x3 << (bit << 1));
-	writel(val | (edge << (bit << 1)), reg);
-	writel(1 << (gpio & 0x1f), port->base + GPIO_ISR);
-
-	return 0;
-}
-
-static void mxc_flip_edge(struct mxc_gpio_port *port, u32 gpio)
-{
-	void __iomem *reg = port->base;
-	u32 bit, val;
-	int edge;
-
-	reg += GPIO_ICR1 + ((gpio & 0x10) >> 2); /* lower or upper register */
-	bit = gpio & 0xf;
-	val = readl(reg);
-	edge = (val >> (bit << 1)) & 3;
-	val &= ~(0x3 << (bit << 1));
-	if (edge == GPIO_INT_HIGH_LEV) {
-		edge = GPIO_INT_LOW_LEV;
-		pr_debug("mxc: switch GPIO %d to low trigger\n", gpio);
-	} else if (edge == GPIO_INT_LOW_LEV) {
-		edge = GPIO_INT_HIGH_LEV;
-		pr_debug("mxc: switch GPIO %d to high trigger\n", gpio);
-	} else {
-		pr_err("mxc: invalid configuration for GPIO %d: %x\n",
-		       gpio, edge);
-		return;
-	}
-	writel(val | (edge << (bit << 1)), reg);
-}
-
-/* handle 32 interrupts in one status register */
-static void mxc_gpio_irq_handler(struct mxc_gpio_port *port, u32 irq_stat)
-{
-	u32 gpio_irq_no_base = port->virtual_irq_start;
-
-	while (irq_stat != 0) {
-		int irqoffset = fls(irq_stat) - 1;
-
-		if (port->both_edges & (1 << irqoffset))
-			mxc_flip_edge(port, irqoffset);
-
-		generic_handle_irq(gpio_irq_no_base + irqoffset);
-
-		irq_stat &= ~(1 << irqoffset);
-	}
-}
-
-/* MX1 and MX3 has one interrupt *per* gpio port */
-static void mx3_gpio_irq_handler(u32 irq, struct irq_desc *desc)
-{
-	u32 irq_stat;
-	struct mxc_gpio_port *port = irq_get_handler_data(irq);
-
-	irq_stat = readl(port->base + GPIO_ISR) & readl(port->base + GPIO_IMR);
-
-	mxc_gpio_irq_handler(port, irq_stat);
-}
-
-/* MX2 has one interrupt *for all* gpio ports */
-static void mx2_gpio_irq_handler(u32 irq, struct irq_desc *desc)
-{
-	u32 irq_msk, irq_stat;
-	struct mxc_gpio_port *port;
-
-	/* walk through all interrupt status registers */
-	list_for_each_entry(port, &mxc_gpio_ports, node) {
-		irq_msk = readl(port->base + GPIO_IMR);
-		if (!irq_msk)
-			continue;
-
-		irq_stat = readl(port->base + GPIO_ISR) & irq_msk;
-		if (irq_stat)
-			mxc_gpio_irq_handler(port, irq_stat);
-	}
-}
-
-/*
- * Set interrupt number "irq" in the GPIO as a wake-up source.
- * While system is running, all registered GPIO interrupts need to have
- * wake-up enabled. When system is suspended, only selected GPIO interrupts
- * need to have wake-up enabled.
- * @param  irq          interrupt source number
- * @param  enable       enable as wake-up if equal to non-zero
- * @return       This function returns 0 on success.
- */
-static int gpio_set_wake_irq(struct irq_data *d, u32 enable)
-{
-	u32 gpio = irq_to_gpio(d->irq);
-	u32 gpio_idx = gpio & 0x1F;
-	struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
-	struct mxc_gpio_port *port = gc->private;
-
-	if (enable) {
-		if (port->irq_high && (gpio_idx >= 16))
-			enable_irq_wake(port->irq_high);
-		else
-			enable_irq_wake(port->irq);
-	} else {
-		if (port->irq_high && (gpio_idx >= 16))
-			disable_irq_wake(port->irq_high);
-		else
-			disable_irq_wake(port->irq);
-	}
-
-	return 0;
-}
-
-static void __init mxc_gpio_init_gc(struct mxc_gpio_port *port)
-{
-	struct irq_chip_generic *gc;
-	struct irq_chip_type *ct;
-
-	gc = irq_alloc_generic_chip("gpio-mxc", 1, port->virtual_irq_start,
-				    port->base, handle_level_irq);
-	gc->private = port;
-
-	ct = gc->chip_types;
-	ct->chip.irq_ack = irq_gc_ack,
-	ct->chip.irq_mask = irq_gc_mask_clr_bit;
-	ct->chip.irq_unmask = irq_gc_mask_set_bit;
-	ct->chip.irq_set_type = gpio_set_irq_type;
-	ct->chip.irq_set_wake = gpio_set_wake_irq,
-	ct->regs.ack = GPIO_ISR;
-	ct->regs.mask = GPIO_IMR;
-
-	irq_setup_generic_chip(gc, IRQ_MSK(32), IRQ_GC_INIT_NESTED_LOCK,
-			       IRQ_NOREQUEST, 0);
-}
-
-static void __devinit mxc_gpio_get_hw(struct platform_device *pdev)
-{
-	const struct of_device_id *of_id =
-			of_match_device(mxc_gpio_dt_ids, &pdev->dev);
-	enum mxc_gpio_hwtype hwtype;
-
-	if (of_id)
-		pdev->id_entry = of_id->data;
-	hwtype = pdev->id_entry->driver_data;
-
-	if (mxc_gpio_hwtype) {
-		/*
-		 * The driver works with a reasonable presupposition,
-		 * that is all gpio ports must be the same type when
-		 * running on one soc.
-		 */
-		BUG_ON(mxc_gpio_hwtype != hwtype);
-		return;
-	}
-
-	if (hwtype == IMX31_GPIO)
-		mxc_gpio_hwdata = &imx31_gpio_hwdata;
-	else
-		mxc_gpio_hwdata = &imx1_imx21_gpio_hwdata;
-
-	mxc_gpio_hwtype = hwtype;
-}
-
-static int __devinit mxc_gpio_probe(struct platform_device *pdev)
-{
-	struct device_node *np = pdev->dev.of_node;
-	struct mxc_gpio_port *port;
-	struct resource *iores;
-	int err;
-
-	mxc_gpio_get_hw(pdev);
-
-	port = kzalloc(sizeof(struct mxc_gpio_port), GFP_KERNEL);
-	if (!port)
-		return -ENOMEM;
-
-	iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!iores) {
-		err = -ENODEV;
-		goto out_kfree;
-	}
-
-	if (!request_mem_region(iores->start, resource_size(iores),
-				pdev->name)) {
-		err = -EBUSY;
-		goto out_kfree;
-	}
-
-	port->base = ioremap(iores->start, resource_size(iores));
-	if (!port->base) {
-		err = -ENOMEM;
-		goto out_release_mem;
-	}
-
-	port->irq_high = platform_get_irq(pdev, 1);
-	port->irq = platform_get_irq(pdev, 0);
-	if (port->irq < 0) {
-		err = -EINVAL;
-		goto out_iounmap;
-	}
-
-	/* disable the interrupt and clear the status */
-	writel(0, port->base + GPIO_IMR);
-	writel(~0, port->base + GPIO_ISR);
-
-	if (mxc_gpio_hwtype == IMX21_GPIO) {
-		/* setup one handler for all GPIO interrupts */
-		if (pdev->id == 0)
-			irq_set_chained_handler(port->irq,
-						mx2_gpio_irq_handler);
-	} else {
-		/* setup one handler for each entry */
-		irq_set_chained_handler(port->irq, mx3_gpio_irq_handler);
-		irq_set_handler_data(port->irq, port);
-		if (port->irq_high > 0) {
-			/* setup handler for GPIO 16 to 31 */
-			irq_set_chained_handler(port->irq_high,
-						mx3_gpio_irq_handler);
-			irq_set_handler_data(port->irq_high, port);
-		}
-	}
-
-	err = bgpio_init(&port->bgc, &pdev->dev, 4,
-			 port->base + GPIO_PSR,
-			 port->base + GPIO_DR, NULL,
-			 port->base + GPIO_GDIR, NULL, false);
-	if (err)
-		goto out_iounmap;
-
-	port->bgc.gc.base = pdev->id * 32;
-	port->bgc.dir = port->bgc.read_reg(port->bgc.reg_dir);
-	port->bgc.data = port->bgc.read_reg(port->bgc.reg_set);
-
-	err = gpiochip_add(&port->bgc.gc);
-	if (err)
-		goto out_bgpio_remove;
-
-	/*
-	 * In dt case, we use gpio number range dynamically
-	 * allocated by gpio core.
-	 */
-	port->virtual_irq_start = MXC_GPIO_IRQ_START + (np ? port->bgc.gc.base :
-							     pdev->id * 32);
-
-	/* gpio-mxc can be a generic irq chip */
-	mxc_gpio_init_gc(port);
-
-	list_add_tail(&port->node, &mxc_gpio_ports);
-
-	return 0;
-
-out_bgpio_remove:
-	bgpio_remove(&port->bgc);
-out_iounmap:
-	iounmap(port->base);
-out_release_mem:
-	release_mem_region(iores->start, resource_size(iores));
-out_kfree:
-	kfree(port);
-	dev_info(&pdev->dev, "%s failed with errno %d\n", __func__, err);
-	return err;
-}
-
-static struct platform_driver mxc_gpio_driver = {
-	.driver		= {
-		.name	= "gpio-mxc",
-		.owner	= THIS_MODULE,
-		.of_match_table = mxc_gpio_dt_ids,
-	},
-	.probe		= mxc_gpio_probe,
-	.id_table	= mxc_gpio_devtype,
-};
-
-static int __init gpio_mxc_init(void)
-{
-	return platform_driver_register(&mxc_gpio_driver);
-}
-postcore_initcall(gpio_mxc_init);
-
-MODULE_AUTHOR("Freescale Semiconductor, "
-	      "Daniel Mack <danielncaiaq.de>, "
-	      "Juergen Beisert <kernel@pengutronix.de>");
-MODULE_DESCRIPTION("Freescale MXC GPIO");
-MODULE_LICENSE("GPL");